Human Muscular system
16. Human Body - Muscular system
Muscular system
Muscles contribute half of our body weight. It is made up special tissues, muscle fibers that can contract or expand depending on the signals from brain and helps us to move. There are 650 muscles. The muscle actions are voluntary and involuntary. We can move our hand according to our wish. It is an involuntary muscle movement. The muscles are attached to bones by stretchy tissue called tendons. When the muscles contract, they pull on the tendons which pull on the bones and cause our limbs to move. Involuntary muscles, such as the heart, diaphragm and intestines, are automatically controlled by the brain.
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Thank you for such an informative blog, I have recently been searching for details about this and yours is the best I have located so far. Human beings muscles can be classified in to two, voluntary and involuntary. The voluntary muscles are controlled by us while the involuntary ones work on their own volition and are controlled by the nervous system. We have no control over the muscles that control the heart.
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